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Influence of mixed material layer formation on hydrogen isotope and He retentions in W exposed to 2014 LHD experiment campaign
- Source :
- Fusion Engineering and Design. 125:458-462
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Influence of mixed material layer formation on hydrogen isotope retention in W exposed to 2014 Large Helical Device (LHD) experiment campaign was evaluated by Thermal Desorption Spectroscopy (TDS), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). It was found that a lot of hydrogen isotopes were trapped by the carbon-dominated mixed-material layer deposited on the plasma facing materials. Most of He was also trapped in the carbon-dominated mixed-material layer and the corresponding desorption temperature was limited to be about 600 K, 900 K and 1200 K, respectively. However, the hydrogen retention behavior for erosion dominated area was clearly different from those for deposition dominated area and typical Plasma Wall Interaction (PWI) area, where He bubbles were introduced near the sample surface, leading to the introduction of various types of trapping sites in W.
- Subjects :
- 010302 applied physics
Materials science
Hydrogen
Thermal desorption spectroscopy
Scanning electron microscope
Mechanical Engineering
Analytical chemistry
chemistry.chemical_element
01 natural sciences
010305 fluids & plasmas
Nuclear Energy and Engineering
X-ray photoelectron spectroscopy
chemistry
Transmission electron microscopy
Desorption
0103 physical sciences
General Materials Science
Atomic physics
Layer (electronics)
Deposition (law)
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 09203796
- Volume :
- 125
- Database :
- OpenAIRE
- Journal :
- Fusion Engineering and Design
- Accession number :
- edsair.doi...........afeaf842a4879d37254f77f0e143665b